236-020 is a wave washer (also known as a wavy spring washer) used in the drive or pump assembly of compatible PowrLiner and PowrTwin airless sprayers. It provides controlled axial spring force, compensates for thermal expansion, and helps maintain bearing preload or component tension to reduce vibration and wear.
| Part Number | 236-020 |
|---|---|
| Part Description | Wave Washer |
| Brand | PowrLiner / PowrTwin |
| Fits | PowrLiner 4955, 6955, 8955, 4950, 6950; PowrTwin 4900, 6900, 8900, 12000Plus |
| Condition | New |
The 236-020 Wave Washer is an OEM replacement wave spring washer designed for specific PowrLiner and PowrTwin airless sprayers. It is typically installed on a shaft or between bearing faces to deliver a consistent axial load, take up assembly tolerances, and absorb shock or vibration. Unlike a flat washer, the wave shape creates spring tension without requiring a full coil spring.
Over time, a wave washer can lose its spring tension (take a permanent set), crack from metal fatigue, or become corroded. A failed washer can lead to bearing play, loose components, excessive noise, or accelerated wear in the drive train. Replacing it with the 236-020 restores proper preload and helps extend the life of adjacent bearings and seals.
| Axial preload | Applies controlled spring force to bearings or assemblies |
|---|---|
| Vibration dampening | Absorbs shock and reduces noise in rotating components |
| Tolerance compensation | Takes up stack‑up variations without rigid spacers |
| Flattened / lost tension | Washer no longer has visible wave or feels "dead" |
|---|---|
| Visible cracks | Fatigue cracks, especially at wave peaks |
| Corrosion or pitting | Rust or chemical attack that weakens the metal |
| Disassembly / rebuild | Preventative replacement during drive or pump overhaul |
Part 236-020 is compatible with the following PowrLiner and PowrTwin models. Always verify with your machine's parts diagram before ordering.
| Brand / Model | Component |
|---|---|
| PowrLiner 4955 | Wave washer (bearing preload / shaft tension) |
| PowrLiner 6955 | Wave washer |
| PowrLiner 8955 | Wave washer |
| PowrLiner 4950 | Wave washer |
| PowrLiner 6950 | Wave washer |
| PowrTwin 4900 | Wave washer |
| PowrTwin 6900 | Wave washer |
| PowrTwin 8900 | Wave washer |
| PowrTwin 12000Plus | Wave washer |
When replacing the wave washer, these related components are often inspected or replaced at the same time.
A worn wave washer can lead to bearing looseness or uneven wear.
Often removed with the washer; inspect for distortion.
If disassembling a gearbox or pump, replace all seals.
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